Integrated circuit packaging system with embedded thermal heat shield and method of manufacture thereof

1. A method of manufacture of an integrated circuit packaging system comprising: mounting a bottom integrated circuit on a bottom substrate having a peripheral thermal via connected to a peripheral thermal interconnect; mounting an inner heat shield, having a top planar portion, over the bottom integrated circuit with the inner heat shield connected to the peripheral thermal via, the inner heat shield having a central planar portion with a plate hole with the central planar portion between the bottom integrated circuit and the top integrated circuit; mounting a top integrated circuit over the inner heat shield; and forming a package encapsulation over the bottom integrated circuit, the inner heat shield, and the top integrated circuit with the top planar portion exposed only at each corners of a package topside of the package encapsulation.

2. The method as claimed in claim 1 wherein mounting the inner heat shield includes mounting the inner heat shield having a horizontal step with a top substrate mounted over the horizontal step.

3. The method as claimed in claim 1 further comprising: applying an inner thermal adhesive on and through the inner heat shield with the inner thermal adhesive on the bottom integrated circuit; and wherein: mounting the top integrated circuit includes mounting the top integrated circuit on the inner thermal adhesive.

4. The method as claimed in claim 1 wherein mounting the inner heat shield includes mounting the inner heat shield having a peripheral leg extending from a foot of the inner heat shield to the top planar portion and an inner support leg extending from the top planar portion to a central planar portion.

5. A method of manufacture of an integrated circuit packaging system comprising: mounting a bottom integrated circuit on a bottom substrate having a peripheral thermal via connected to a peripheral thermal interconnect; mounting an inner heat shield over the bottom integrated circuit with the inner heat shield connected to and directly over the peripheral thermal via, the inner heat shield having a central planar portion with a plate hole with the central planar portion between the bottom integrated circuit and the top integrated circuit; applying an inner thermal adhesive over the inner heat shield between the bottom integrated circuit and the top integrated circuit; mounting a top integrated circuit over the inner thermal adhesive; and forming a package encapsulation over the bottom integrated circuit, the inner heat shield, and the top integrated circuit with a top planar portion of the inner heat shield exposed only at each corners of a package topside of the package encapsulation.

6. The method as claimed in claim 5 wherein mounting the inner heat shield includes mounting the inner heat shield having an inner grounding leg, the inner grounding leg connected to an inner thermal interconnect through an inner thermal via.

7. The method as claimed in claim 5 further comprising forming an inner package with an active side of the top integrated circuit on the inner thermal adhesive.

8. The method as claimed in claim 5 further comprising: forming an inner package having a top thermal interconnect embedded in the inner package; and connecting the inner package to the inner heat shield with an inner conductive adhesive.

9. The method as claimed in claim 5 further comprising mounting a top heat shield over the package capsulation, the top heat shield connected to the inner heat shield through a top conductive adhesive.

10. An integrated circuit packaging system comprising: a bottom integrated circuit on a bottom substrate having a peripheral thermal via connected to a peripheral thermal interconnect; an inner heat shield, having a top planar portion, over the bottom integrated circuit with the inner heat shield connected to the peripheral thermal via, the inner heat shield having a central planar portion with a plate hole with the central planar portion between the bottom integrated circuit and the top integrated circuit; a top integrated circuit over the inner heat shield; and a package encapsulation over the bottom integrated circuit, the inner heat shield, and the top integrated circuit with the top planar portion exposed only at each corners of a package topside of the package encapsulation.

11. The system as claimed in claim 10 wherein the inner heat shield having a horizontal step with a top substrate mounted over the horizontal step.

12. The system as claimed in claim 10 further comprising: an inner thermal adhesive on and through the inner heat shield with the inner thermal adhesive on the bottom integrated circuit; and wherein: the top integrated circuit on the inner thermal adhesive.

13. The system as claimed in claim 10 wherein the inner heat shield having a peripheral leg extending from a foot to the top planar portion and an inner support leg extending from the top planar portion to a central planar portion.

14. The system as claimed in claim 10 further comprising: an inner thermal adhesive over the inner heat shield between the bottom integrated circuit and the top integrated circuit; and the top integrated circuit over the inner thermal adhesive.

15. The system as claimed in claim 14 wherein the inner heat shield having an inner grounding leg, the inner grounding leg connected to an inner thermal interconnect through an inner thermal via.

16. The system as claimed in claim 14 further comprising an inner package with an active side of the top integrated circuit on the inner thermal adhesive.

17. The system as claimed in claim 14 further comprising: an inner package having a top thermal interconnect embedded in the inner package; and the inner package connected to the inner heat shield with an inner conductive adhesive.

18. The system as claimed in claim 14 further comprising a top heat shield over the package capsulation, the top heat shield connected to the inner heat shield through a top conductive adhesive.